When you create a data loader task, you'll need to create or select a source connection and a target connection. Data Loader uses the connection information to read data from your source and load data to your target.
Create a connection on the Connect Source page or the Connect Target page when you create or edit a data loader task. You can also create, edit, and delete connections in the Administrator service.
When you create a connection, you enter the connection properties. Connection properties vary based on the connection type. For example, for an Amazon S3 V2 connection, you'll need to enter the access key, secret key, and other properties. For more information about the connection properties for different connection types, see Connections.